Granted Patent
Utility
US 4,732,459 · App. 07/006,279
Fast telephoto lens
Inventor:
Kiyoshi Hayashi
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Jan 20, 1987
Inventor
Kiyoshi Hayashi
Assignee (at issue)
Nippon Kogaku K.K.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.